Aiph5u
June 15, 2024, 4:54am
4
Hey Joshua,
I would do the initial squaring and adjusting coplanarity, tramming and surfacing of the machine and then with your favourite CAD/CAM software, create a 3D model and output a g-code toolpath and mill something yourself. Then you can see if your machine is accurate.
There is a video for tramming the milling motor by observing the visible patterns a surfacing bit leaves behind:
The Mitz Pellicciotta method , which is a method that works the better the larger the bit diameter is, because it looks at the direction of the patterns such a bit makes when it is not perpendicular to wasteboard surface, works only as third step after you ensured your machine is
rectangular (“squared”) (bar gauge ) and 2. coplanar (“not twisted”) (fishing line method )
Only then I would proceed with
Tramming the router (Checking for perpendicularity between milling motor axis and (different areas of) worksurface)
IMPORTANT NOTE: Surfacing the wasteboard does help nothing if the machine is not accurately rectangular (“squared”) and coplanar (not twisted)! Not at all! All your workpieces including the wasteboard will remain a parallelogram and be twisted if you don’t ensured steps 1 and 2 accurately.
Finally you can check the tramming of the milling motor. One of its adjustments is made with the forward/back tilt of the two steel hollow shafts by adjusting their adjustment bolts in the black anodized axis ends (see Support: Tramming - Front To Back for details). If the tilt differs on one end of the axis from the other end, the milling motor will tilt from one end to the other and make the line it mills with your v-bit slightly deviating from a right angle.
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